Gridiron/ˈɡrɪdaɪərn/ Definition 1 of 3Pro Tip 1/3Cooking Context Gridiron refers to a grilling surface, commonly used in BBQ conversations. Let's fire up the gridiron for some barbecue. Pro Tip 2/3Visual Imagery Imagine a grid of iron bars - that's how a gridiron looks. Grandpa told me he wants a new gridiron with wider bars. Pro Tip 3/3Preparation Tool A gridiron is an essential in preparing grilled foods. We need to scrub the gridiron before we start cooking.